JPS5784677A - Frequency detecting method for facsimile device - Google Patents

Frequency detecting method for facsimile device

Info

Publication number
JPS5784677A
JPS5784677A JP55161557A JP16155780A JPS5784677A JP S5784677 A JPS5784677 A JP S5784677A JP 55161557 A JP55161557 A JP 55161557A JP 16155780 A JP16155780 A JP 16155780A JP S5784677 A JPS5784677 A JP S5784677A
Authority
JP
Japan
Prior art keywords
cpu
facsimile device
detecting method
frequency detecting
hardware
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55161557A
Other languages
Japanese (ja)
Inventor
Fusakichi Okochi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55161557A priority Critical patent/JPS5784677A/en
Publication of JPS5784677A publication Critical patent/JPS5784677A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

PURPOSE:To realize the confirmation of the control signal of facsimile with a simple constitution, by measuring the number of incoming pulse or period. CONSTITUTION:After an incoming signal is rejected for noise at a band pass filter 10, it is amplified and converted to a TTL level and fetched to a CPU. The CPU makes the period measurement of an input pulse with the software. As the CPU, that in the facsimile device is used. As the hardware, it can be done only with the one which converts the input signal into the TTL level and the band pass filter can be used only having width of 300-2,500Hz for noise rejection simply, allowing to remarkably reduce the cost of the hardware.
JP55161557A 1980-11-17 1980-11-17 Frequency detecting method for facsimile device Pending JPS5784677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55161557A JPS5784677A (en) 1980-11-17 1980-11-17 Frequency detecting method for facsimile device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55161557A JPS5784677A (en) 1980-11-17 1980-11-17 Frequency detecting method for facsimile device

Publications (1)

Publication Number Publication Date
JPS5784677A true JPS5784677A (en) 1982-05-27

Family

ID=15737365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55161557A Pending JPS5784677A (en) 1980-11-17 1980-11-17 Frequency detecting method for facsimile device

Country Status (1)

Country Link
JP (1) JPS5784677A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61224567A (en) * 1985-03-28 1986-10-06 Fujitsu Ltd System for confirming reply of opposite party at automatic calling
CN103582982A (en) * 2011-06-06 2014-02-12 罗伯特·博世有限公司 Direct plug element with a protected direct contact

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61224567A (en) * 1985-03-28 1986-10-06 Fujitsu Ltd System for confirming reply of opposite party at automatic calling
CN103582982A (en) * 2011-06-06 2014-02-12 罗伯特·博世有限公司 Direct plug element with a protected direct contact

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